[Intel-gfx] [PATCH igt] tests: add pc8
Paulo Zanoni
przanoni at gmail.com
Mon Aug 19 18:20:02 CEST 2013
From: Paulo Zanoni <paulo.r.zanoni at intel.com>
This test chekcs our code that enables Package C8+. The environment
requirements for this test are quite complicated:
- The machine needs to be properly configured to reach PC8+ when
possible, which means all the power management policies and device
drivers must be properly configured.
- You need at least one output connected.
- You need the /dev/cpu/0/msr file available.
- You need the /dev/i2c-* files available.
v2: - Many many changes due to the latest review comments and rebase.
Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
---
tests/.gitignore | 1 +
tests/Makefile.am | 1 +
tests/pc8.c | 804 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 806 insertions(+)
create mode 100644 tests/pc8.c
diff --git a/tests/.gitignore b/tests/.gitignore
index b5eb7a5..19f827a 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -93,6 +93,7 @@ getversion
kms_flip
kms_render
kms_setmode
+pc8
prime_nv_api
prime_nv_pcopy
prime_nv_test
diff --git a/tests/Makefile.am b/tests/Makefile.am
index c724829..370a700 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -45,6 +45,7 @@ TESTS_progs_M = \
kms_render \
kms_setmode \
$(NOUVEAU_TESTS_M) \
+ pc8 \
prime_self_import \
$(NULL)
diff --git a/tests/pc8.c b/tests/pc8.c
new file mode 100644
index 0000000..06c54b7
--- /dev/null
+++ b/tests/pc8.c
@@ -0,0 +1,804 @@
+/*
+ * Copyright © 2013 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ * Paulo Zanoni <paulo.r.zanoni at intel.com>
+ *
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <string.h>
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <linux/i2c.h>
+#include <linux/i2c-dev.h>
+
+#include "drm.h"
+#include "drmtest.h"
+#include "intel_batchbuffer.h"
+#include "intel_gpu_tools.h"
+#include "i915_drm.h"
+
+#define MSR_PC8_RES 0x630
+#define MSR_PC9_RES 0x631
+#define MSR_PC10_RES 0x632
+
+#define MAX_CONNECTORS 32
+#define MAX_ENCODERS 32
+#define MAX_CRTCS 16
+
+int drm_fd, msr_fd;
+struct mode_set_data ms_data;
+
+/* Stuff used when creating FBs and mode setting. */
+struct mode_set_data {
+ drmModeResPtr res;
+ drmModeConnectorPtr connectors[MAX_CONNECTORS];
+ drmModePropertyBlobPtr edids[MAX_CONNECTORS];
+
+ drm_intel_bufmgr *bufmgr;
+ uint32_t devid;
+};
+
+/* Stuff we query at different times so we can compare. */
+struct compare_data {
+ drmModeResPtr res;
+ drmModeEncoderPtr encoders[MAX_ENCODERS];
+ drmModeConnectorPtr connectors[MAX_CONNECTORS];
+ drmModeCrtcPtr crtcs[MAX_CRTCS];
+ drmModePropertyBlobPtr edids[MAX_CONNECTORS];
+};
+
+struct compare_registers {
+ /* We know these are lost */
+ uint32_t arb_mode;
+ uint32_t tilectl;
+
+ /* Stuff touched at init_clock_gating, so we can make sure we
+ * don't need to call it when reiniting. */
+ uint32_t gen6_ucgctl2;
+ uint32_t gen7_l3cntlreg1;
+ uint32_t transa_chicken1;
+
+ uint32_t deier;
+ uint32_t gtier;
+
+ uint32_t ddi_buf_trans_a_1;
+ uint32_t ddi_buf_trans_b_5;
+ uint32_t ddi_buf_trans_c_10;
+ uint32_t ddi_buf_trans_d_15;
+ uint32_t ddi_buf_trans_e_20;
+};
+
+/* If the read fails, then the machine doesn't support PC8+ residencies. */
+static bool supports_pc8_plus_residencies(void)
+{
+ int rc;
+ uint64_t val;
+
+ rc = pread(msr_fd, &val, sizeof(uint64_t), MSR_PC8_RES);
+ if (!rc == sizeof(val))
+ return false;
+ rc = pread(msr_fd, &val, sizeof(uint64_t), MSR_PC9_RES);
+ if (!rc == sizeof(val))
+ return false;
+ rc = pread(msr_fd, &val, sizeof(uint64_t), MSR_PC10_RES);
+ if (!rc == sizeof(val))
+ return false;
+
+ return true;
+}
+
+static uint64_t get_residency(uint32_t type)
+{
+ int rc;
+ uint64_t ret;
+
+ rc = pread(msr_fd, &ret, sizeof(uint64_t), type);
+ igt_assert(rc == sizeof(ret));
+
+ return ret;
+}
+
+static bool pc8_plus_residency_changed(unsigned int timeout_sec)
+{
+ unsigned int i;
+ uint64_t res_pc8, res_pc9, res_pc10;
+ int to_sleep = 100 * 1000;
+
+ res_pc8 = get_residency(MSR_PC8_RES);
+ res_pc9 = get_residency(MSR_PC9_RES);
+ res_pc10 = get_residency(MSR_PC10_RES);
+
+ for (i = 0; i < timeout_sec * 1000 * 1000; i += to_sleep) {
+ if (res_pc8 != get_residency(MSR_PC8_RES) ||
+ res_pc9 != get_residency(MSR_PC9_RES) ||
+ res_pc10 != get_residency(MSR_PC10_RES)) {
+ return true;
+ }
+ usleep(to_sleep);
+ }
+
+ return false;
+}
+
+/* Checks not only if PC8+ is allowed, but also if we're reaching it.
+ * We call this when we expect this function to return quickly since PC8 is
+ * actually enabled, so the 30s timeout we use shouldn't matter. */
+static bool pc8_plus_enabled(void)
+{
+ return pc8_plus_residency_changed(30);
+}
+
+/* We call this when we expect PC8+ to be actually disabled, so we should not
+ * return until the 5s timeout expires. In other words: in the "happy case",
+ * every time we call this function the program will take 5s more to finish. */
+static bool pc8_plus_disabled(void)
+{
+ return !pc8_plus_residency_changed(5);
+}
+
+static void disable_all_screens(struct mode_set_data *data)
+{
+ int i, rc;
+
+ for (i = 0; i < data->res->count_crtcs; i++) {
+ rc = drmModeSetCrtc(drm_fd, data->res->crtcs[i], -1, 0, 0,
+ NULL, 0, NULL);
+ igt_assert(rc == 0);
+ }
+}
+
+static uint32_t create_fb(struct mode_set_data *data, int width, int height)
+{
+ struct kmstest_fb fb;
+ cairo_t *cr;
+ uint32_t buffer_id;
+
+ buffer_id = kmstest_create_fb(drm_fd, width, height, 32, 24, false,
+ &fb);
+ cr = kmstest_get_cairo_ctx(drm_fd, &fb);
+ kmstest_paint_test_pattern(cr, width, height);
+ return buffer_id;
+}
+
+static void enable_one_screen(struct mode_set_data *data)
+{
+ uint32_t crtc_id = 0, buffer_id = 0, connector_id = 0;
+ drmModeModeInfoPtr mode = NULL;
+ int i, rc;
+
+ for (i = 0; i < data->res->count_connectors; i++) {
+ drmModeConnectorPtr c = data->connectors[i];
+
+ if (c->connection == DRM_MODE_CONNECTED && c->count_modes) {
+ connector_id = c->connector_id;
+ mode = &c->modes[0];
+ break;
+ }
+ }
+
+ crtc_id = data->res->crtcs[0];
+ buffer_id = create_fb(data, mode->hdisplay, mode->vdisplay);
+
+ igt_assert(crtc_id);
+ igt_assert(buffer_id);
+ igt_assert(connector_id);
+ igt_assert(mode);
+
+ rc = drmModeSetCrtc(drm_fd, crtc_id, buffer_id, 0, 0, &connector_id,
+ 1, mode);
+ igt_assert(rc == 0);
+}
+
+static drmModePropertyBlobPtr get_connector_edid(drmModeConnectorPtr connector,
+ int index)
+{
+ unsigned int i;
+ drmModeObjectPropertiesPtr props;
+ drmModePropertyBlobPtr ret = NULL;
+
+ props = drmModeObjectGetProperties(drm_fd, connector->connector_id,
+ DRM_MODE_OBJECT_CONNECTOR);
+
+ for (i = 0; i < props->count_props; i++) {
+ drmModePropertyPtr prop = drmModeGetProperty(drm_fd,
+ props->props[i]);
+
+ if (strcmp(prop->name, "EDID") == 0) {
+ igt_assert(prop->flags & DRM_MODE_PROP_BLOB);
+ igt_assert(prop->count_blobs == 0);
+ ret = drmModeGetPropertyBlob(drm_fd,
+ props->prop_values[i]);
+ }
+
+ drmModeFreeProperty(prop);
+ }
+
+ drmModeFreeObjectProperties(props);
+ return ret;
+}
+
+static void init_mode_set_data(struct mode_set_data *data)
+{
+ int i;
+
+ data->res = drmModeGetResources(drm_fd);
+ igt_assert(data->res);
+ igt_assert(data->res->count_connectors <= MAX_CONNECTORS);
+
+ for (i = 0; i < data->res->count_connectors; i++) {
+ data->connectors[i] = drmModeGetConnector(drm_fd,
+ data->res->connectors[i]);
+ data->edids[i] = get_connector_edid(data->connectors[i], i);
+ }
+
+ data->bufmgr = drm_intel_bufmgr_gem_init(drm_fd, 4096);
+ data->devid = intel_get_drm_devid(drm_fd);
+
+ do_or_die(igt_set_vt_graphics_mode());
+ drm_intel_bufmgr_gem_enable_reuse(data->bufmgr);
+}
+
+static void fini_mode_set_data(struct mode_set_data *data)
+{
+ int i;
+
+ drm_intel_bufmgr_destroy(data->bufmgr);
+
+ for (i = 0; i < data->res->count_connectors; i++) {
+ drmModeFreeConnector(data->connectors[i]);
+ drmModeFreePropertyBlob(data->edids[i]);
+ }
+ drmModeFreeResources(data->res);
+}
+
+static void get_drm_info(struct compare_data *data)
+{
+ int i;
+
+ data->res = drmModeGetResources(drm_fd);
+ igt_assert(data->res);
+
+ igt_assert(data->res->count_connectors <= MAX_CONNECTORS);
+ igt_assert(data->res->count_encoders <= MAX_ENCODERS);
+ igt_assert(data->res->count_crtcs <= MAX_CRTCS);
+
+ for (i = 0; i < data->res->count_connectors; i++) {
+ data->connectors[i] = drmModeGetConnector(drm_fd,
+ data->res->connectors[i]);
+ data->edids[i] = get_connector_edid(data->connectors[i], i);
+ }
+ for (i = 0; i < data->res->count_encoders; i++)
+ data->encoders[i] = drmModeGetEncoder(drm_fd,
+ data->res->encoders[i]);
+ for (i = 0; i < data->res->count_crtcs; i++)
+ data->crtcs[i] = drmModeGetCrtc(drm_fd, data->res->crtcs[i]);
+}
+
+static void get_registers(struct compare_registers *data)
+{
+ intel_register_access_init(intel_get_pci_device(), 0);
+ data->arb_mode = INREG(0x4030);
+ data->tilectl = INREG(0x101000);
+ data->gen6_ucgctl2 = INREG(0x9404);
+ data->gen7_l3cntlreg1 = INREG(0xB0C1);
+ data->transa_chicken1 = INREG(0xF0060);
+ data->deier = INREG(0x4400C);
+ data->gtier = INREG(0x4401C);
+ data->ddi_buf_trans_a_1 = INREG(0x64E00);
+ data->ddi_buf_trans_b_5 = INREG(0x64E70);
+ data->ddi_buf_trans_c_10 = INREG(0x64EE0);
+ data->ddi_buf_trans_d_15 = INREG(0x64F58);
+ data->ddi_buf_trans_e_20 = INREG(0x64FCC);
+ intel_register_access_fini();
+}
+
+static void free_drm_info(struct compare_data *data)
+{
+ int i;
+
+ for (i = 0; i < data->res->count_connectors; i++) {
+ drmModeFreeConnector(data->connectors[i]);
+ drmModeFreePropertyBlob(data->edids[i]);
+ }
+ for (i = 0; i < data->res->count_encoders; i++)
+ drmModeFreeEncoder(data->encoders[i]);
+ for (i = 0; i < data->res->count_crtcs; i++)
+ drmModeFreeCrtc(data->crtcs[i]);
+
+ drmModeFreeResources(data->res);
+}
+
+#define COMPARE(d1, d2, data) igt_assert(d1->data == d2->data)
+#define COMPARE_ARRAY(d1, d2, size, data) do { \
+ for (i = 0; i < size; i++) \
+ igt_assert(d1->data[i] == d2->data[i]); \
+} while (0)
+
+static void assert_drm_resources_equal(struct compare_data *d1,
+ struct compare_data *d2)
+{
+ COMPARE(d1, d2, res->count_connectors);
+ COMPARE(d1, d2, res->count_encoders);
+ COMPARE(d1, d2, res->count_crtcs);
+ COMPARE(d1, d2, res->min_width);
+ COMPARE(d1, d2, res->max_width);
+ COMPARE(d1, d2, res->min_height);
+ COMPARE(d1, d2, res->max_height);
+}
+
+static void assert_modes_equal(drmModeModeInfoPtr m1, drmModeModeInfoPtr m2)
+{
+ COMPARE(m1, m2, clock);
+ COMPARE(m1, m2, hdisplay);
+ COMPARE(m1, m2, hsync_start);
+ COMPARE(m1, m2, hsync_end);
+ COMPARE(m1, m2, htotal);
+ COMPARE(m1, m2, hskew);
+ COMPARE(m1, m2, vdisplay);
+ COMPARE(m1, m2, vsync_start);
+ COMPARE(m1, m2, vsync_end);
+ COMPARE(m1, m2, vtotal);
+ COMPARE(m1, m2, vscan);
+ COMPARE(m1, m2, vrefresh);
+ COMPARE(m1, m2, flags);
+ COMPARE(m1, m2, type);
+ igt_assert(strcmp(m1->name, m2->name) == 0);
+}
+
+static void assert_drm_connectors_equal(drmModeConnectorPtr c1,
+ drmModeConnectorPtr c2)
+{
+ int i;
+
+ COMPARE(c1, c2, connector_id);
+ COMPARE(c1, c2, connector_type);
+ COMPARE(c1, c2, connector_type_id);
+ COMPARE(c1, c2, mmWidth);
+ COMPARE(c1, c2, mmHeight);
+ COMPARE(c1, c2, count_modes);
+ COMPARE(c1, c2, count_props);
+ COMPARE(c1, c2, count_encoders);
+ COMPARE_ARRAY(c1, c2, c1->count_props, props);
+ COMPARE_ARRAY(c1, c2, c1->count_encoders, encoders);
+
+ for (i = 0; i < c1->count_modes; i++)
+ assert_modes_equal(&c1->modes[0], &c2->modes[0]);
+}
+
+static void assert_drm_encoders_equal(drmModeEncoderPtr e1,
+ drmModeEncoderPtr e2)
+{
+ COMPARE(e1, e2, encoder_id);
+ COMPARE(e1, e2, encoder_type);
+ COMPARE(e1, e2, possible_crtcs);
+ COMPARE(e1, e2, possible_clones);
+}
+
+static void assert_drm_crtcs_equal(drmModeCrtcPtr c1, drmModeCrtcPtr c2)
+{
+ COMPARE(c1, c2, crtc_id);
+}
+
+static void assert_drm_edids_equal(drmModePropertyBlobPtr e1,
+ drmModePropertyBlobPtr e2)
+{
+ if (!e1 && !e2)
+ return;
+ igt_assert(e1 && e2);
+
+ COMPARE(e1, e2, id);
+ COMPARE(e1, e2, length);
+
+ igt_assert(memcmp(e1->data, e2->data, e1->length) == 0);
+}
+
+static void compare_registers(struct compare_registers *d1,
+ struct compare_registers *d2)
+{
+ COMPARE(d1, d2, gen6_ucgctl2);
+ COMPARE(d1, d2, gen7_l3cntlreg1);
+ COMPARE(d1, d2, transa_chicken1);
+ COMPARE(d1, d2, arb_mode);
+ COMPARE(d1, d2, tilectl);
+ COMPARE(d1, d2, arb_mode);
+ COMPARE(d1, d2, tilectl);
+ COMPARE(d1, d2, gtier);
+ COMPARE(d1, d2, ddi_buf_trans_a_1);
+ COMPARE(d1, d2, ddi_buf_trans_b_5);
+ COMPARE(d1, d2, ddi_buf_trans_c_10);
+ COMPARE(d1, d2, ddi_buf_trans_d_15);
+ COMPARE(d1, d2, ddi_buf_trans_e_20);
+}
+
+static void assert_drm_infos_equal(struct compare_data *d1,
+ struct compare_data *d2)
+{
+ int i;
+
+ assert_drm_resources_equal(d1, d2);
+
+ for (i = 0; i < d1->res->count_connectors; i++) {
+ assert_drm_connectors_equal(d1->connectors[i],
+ d2->connectors[i]);
+ assert_drm_edids_equal(d1->edids[i], d2->edids[i]);
+ }
+
+ for (i = 0; i < d1->res->count_encoders; i++)
+ assert_drm_encoders_equal(d1->encoders[i], d2->encoders[i]);
+
+ for (i = 0; i < d1->res->count_crtcs; i++)
+ assert_drm_crtcs_equal(d1->crtcs[i], d2->crtcs[i]);
+}
+
+static void blt_color_fill(struct intel_batchbuffer *batch,
+ drm_intel_bo *buf,
+ const unsigned int pages)
+{
+ const unsigned short height = pages/4;
+ const unsigned short width = 4096;
+
+ BEGIN_BATCH(5);
+ OUT_BATCH(COLOR_BLT_CMD | COLOR_BLT_WRITE_ALPHA | COLOR_BLT_WRITE_RGB);
+ OUT_BATCH((3 << 24) | /* 32 Bit Color */
+ 0xF0 | /* Raster OP copy background register */
+ 0); /* Dest pitch is 0 */
+ OUT_BATCH(width << 16 | height);
+ OUT_RELOC(buf, I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER, 0);
+ OUT_BATCH(rand()); /* random pattern */
+ ADVANCE_BATCH();
+}
+
+static void test_batch(struct mode_set_data *data)
+{
+ struct intel_batchbuffer *batch;
+ int64_t timeout_ns = 1000 * 1000 * 1000 * 2;
+ drm_intel_bo *dst;
+ int i, rc;
+
+ dst = drm_intel_bo_alloc(data->bufmgr, "dst", (8 << 20), 4096);
+
+ batch = intel_batchbuffer_alloc(data->bufmgr,
+ intel_get_drm_devid(drm_fd));
+
+ for (i = 0; i < 1000; i++)
+ blt_color_fill(batch, dst, ((8 << 20) >> 12));
+
+ rc = drm_intel_gem_bo_wait(dst, timeout_ns);
+ igt_assert(!rc);
+
+ intel_batchbuffer_free(batch);
+}
+
+/* We could check the checksum too, but just the header is probably enough. */
+static bool edid_is_valid(const unsigned char *edid)
+{
+ char edid_header[] = {
+ 0x0, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x0,
+ };
+
+ return (memcmp(edid, edid_header, sizeof(edid_header)) == 0);
+}
+
+static int count_drm_valid_edids(struct mode_set_data *data)
+{
+ int i, ret = 0;
+
+ for (i = 0; i < data->res->count_connectors; i++)
+ if (data->edids[i] && edid_is_valid(data->edids[i]->data))
+ ret++;
+ return ret;
+}
+
+static int count_drm_edp_outputs(struct mode_set_data *data)
+{
+ int i, ret = 0;
+
+ for (i = 0; i < data->res->count_connectors; i++)
+ if (data->connectors[i]->connector_type ==
+ DRM_MODE_CONNECTOR_eDP)
+ ret++;
+ return ret;
+}
+
+static bool i2c_edid_is_valid(int fd)
+{
+ int rc;
+ unsigned char edid[128] = {};
+ struct i2c_msg msgs[] = {
+ { /* Start at 0. */
+ .addr = 0x50,
+ .flags = 0,
+ .len = 1,
+ .buf = edid,
+ }, { /* Now read the EDID. */
+ .addr = 0x50,
+ .flags = I2C_M_RD,
+ .len = 128,
+ .buf = edid,
+ }
+ };
+ struct i2c_rdwr_ioctl_data msgset = {
+ .msgs = msgs,
+ .nmsgs = 2,
+ };
+
+ rc = ioctl(fd, I2C_RDWR, &msgset);
+ return (rc >= 0) ? edid_is_valid(edid) : false;
+}
+
+static int count_i2c_valid_edids(void)
+{
+ int fd, ret = 0;
+ DIR *dir;
+
+ struct dirent *dirent;
+ char full_name[32];
+
+ dir = opendir("/dev/");
+ igt_assert(dir);
+
+ while ((dirent = readdir(dir))) {
+ if (strncmp(dirent->d_name, "i2c-", 4) == 0) {
+ snprintf(full_name, 32, "/dev/%s", dirent->d_name);
+ fd = open(full_name, O_RDWR);
+ igt_assert(fd != -1);
+ if (i2c_edid_is_valid(fd))
+ ret++;
+ close(fd);
+ }
+ }
+
+ closedir(dir);
+
+ return 0;
+}
+
+/* We run this test when all outputs are turned off. When eDP panels are turned
+ * off, I2C doesn't work on them and we get a nice dmesg backtrace. So count how
+ * many eDP panels we have and subtract them. */
+static bool test_i2c(struct mode_set_data *data)
+{
+ int i2c_edids = count_i2c_valid_edids();
+ int drm_edids = count_drm_valid_edids(data);
+ int edps = count_drm_edp_outputs(data);
+
+ return i2c_edids + edps == drm_edids;
+}
+
+static bool setup_environment(void)
+{
+ int i2c_dev_files;
+ DIR *dev_dir;
+ struct dirent *dirent;
+
+ drm_fd = drm_open_any();
+ if (drm_fd <= 0)
+ return false;
+
+ init_mode_set_data(&ms_data);
+
+ /* Only Haswell supports the PC8 feature. */
+ if (!IS_HASWELL(ms_data.devid)) {
+ printf("PC8+ feature only supported on Haswell.\n");
+ return false;
+ }
+
+ /* Make sure our Kernel supports MSR and the module is loaded. */
+ msr_fd = open("/dev/cpu/0/msr", O_RDONLY);
+ if (msr_fd == -1) {
+ printf("Can't open /dev/cpu/0/msr.\n");
+ return false;
+ }
+
+ /* Make sure the /dev/i2c-* files exist. */
+ dev_dir = opendir("/dev");
+ if (!dev_dir) {
+ printf("Can't open /dev.\n");
+ return false;
+ }
+ i2c_dev_files = 0;
+ while ((dirent = readdir(dev_dir))) {
+ if (strncmp(dirent->d_name, "i2c-", 4) == 0)
+ i2c_dev_files++;
+ }
+ closedir(dev_dir);
+ if (!i2c_dev_files) {
+ printf("No /dev/i2c-* files.\n");
+ return false;
+ }
+
+ /* Non-ULT machines don't support PC8+. */
+ if (!supports_pc8_plus_residencies()) {
+ printf("Machine doesn't support PC8+ residencies.\n");
+ return false;
+ }
+
+ /* Make sure PC8+ residencies move! */
+ disable_all_screens(&ms_data);
+ if (!pc8_plus_enabled()) {
+ printf("Machine is not reaching PC8+ states, please check its "
+ "configuration.\n");
+ return false;
+ }
+
+ /* Make sure PC8+ residencies stop! */
+ enable_one_screen(&ms_data);
+ if (!pc8_plus_disabled()) {
+ printf("PC8+ residency didn't stop with screen enabled.\n");
+ return false;
+ }
+
+ return true;
+}
+
+static void teardown_environment(void)
+{
+ fini_mode_set_data(&ms_data);
+ drmClose(drm_fd);
+ close(msr_fd);
+}
+
+/* Test of the DRM resources reported by the IOCTLs are still the same. This
+ * ensures we still see the monitors with the same eyes. We get the EDIDs and
+ * compare them, which ensures we use DP AUX or GMBUS depending on what's
+ * connected. */
+static void drm_resources_equal_subtest(void)
+{
+ struct compare_data pre_pc8, during_pc8, post_pc8;
+
+ printf("Checking the if the DRM resources match.\n");
+
+ enable_one_screen(&ms_data);
+ igt_assert(pc8_plus_disabled());
+ get_drm_info(&pre_pc8);
+ igt_assert(pc8_plus_disabled());
+
+ disable_all_screens(&ms_data);
+ igt_assert(pc8_plus_enabled());
+ get_drm_info(&during_pc8);
+ igt_assert(pc8_plus_enabled());
+
+ enable_one_screen(&ms_data);
+ igt_assert(pc8_plus_disabled());
+ get_drm_info(&post_pc8);
+ igt_assert(pc8_plus_disabled());
+
+ assert_drm_infos_equal(&pre_pc8, &during_pc8);
+ assert_drm_infos_equal(&pre_pc8, &post_pc8);
+
+ free_drm_info(&pre_pc8);
+ free_drm_info(&during_pc8);
+ free_drm_info(&post_pc8);
+}
+
+/* Make sure interrupts are working. */
+static void batch_subtest(void)
+{
+ printf("Testing batchbuffers.\n");
+
+ enable_one_screen(&ms_data);
+ igt_assert(pc8_plus_disabled());
+
+ disable_all_screens(&ms_data);
+ igt_assert(pc8_plus_enabled());
+ test_batch(&ms_data);
+ igt_assert(pc8_plus_enabled());
+}
+
+/* Try to use raw I2C, which also needs interrupts. */
+static void i2c_subtest(void)
+{
+ printf("Testing raw i2c protocol calls.\n");
+
+ enable_one_screen(&ms_data);
+ igt_assert(pc8_plus_disabled());
+
+ disable_all_screens(&ms_data);
+ igt_assert(pc8_plus_enabled());
+ igt_assert(test_i2c(&ms_data));
+ igt_assert(pc8_plus_enabled());
+
+ enable_one_screen(&ms_data);
+}
+
+/* Make us enter/leave PC8+ many times. */
+static void stress_test(void)
+{
+ int i;
+
+ printf("Stress testing.\n");
+
+ for (i = 0; i < 100; i++) {
+ disable_all_screens(&ms_data);
+ igt_assert(pc8_plus_enabled());
+ test_batch(&ms_data);
+ igt_assert(pc8_plus_enabled());
+ }
+}
+
+/* Just reading/writing registers from outside the Kernel is not really a safe
+ * thing to do on Haswell, so don't do this test on the default case. */
+static void register_compare_subtest(void)
+{
+ struct compare_registers pre_pc8, post_pc8;
+
+ printf("Testing register compare.\n");
+
+ enable_one_screen(&ms_data);
+ igt_assert(pc8_plus_disabled());
+ get_registers(&pre_pc8);
+ igt_assert(pc8_plus_disabled());
+
+ disable_all_screens(&ms_data);
+ igt_assert(pc8_plus_enabled());
+ enable_one_screen(&ms_data);
+ igt_assert(pc8_plus_disabled());
+ /* Wait for the registers to be restored. */
+ sleep(1);
+ get_registers(&post_pc8);
+ igt_assert(pc8_plus_disabled());
+
+ compare_registers(&pre_pc8, &post_pc8);
+}
+
+int main(int argc, char *argv[])
+{
+ bool do_register_compare = false;
+
+ if (argc > 1 && strcmp(argv[1], "--do-register-compare") == 0)
+ do_register_compare = true;
+
+ igt_subtest_init(argc, argv);
+
+ /* Skip instead of failing in case the machine is not prepared to reach
+ * PC8+. We don't want bug reports from cases where the machine is just
+ * not properly configured. */
+ printf("Checking if the environment is properly configured.\n");
+ if (!setup_environment())
+ return 77;
+
+ igt_subtest("drm-resources-equal")
+ drm_resources_equal_subtest();
+ igt_subtest("batch")
+ batch_subtest();
+ igt_subtest("i2c")
+ i2c_subtest();
+ igt_subtest("stress-test")
+ stress_test();
+ if (do_register_compare)
+ igt_subtest("register-compare")
+ register_compare_subtest();
+
+ teardown_environment();
+
+ printf("Done!\n");
+ return 0;
+}
--
1.8.1.2
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